Terminology - Fisher F11 Owner's Manual

MF11-manual_MF11-manual 5/28/15 10:46 AM Page 6
TROUBLESHOOTING GUIDE
SYMPTOM CAUSE
Detector chatters, • Using detector
beeps erratically indoors
or has low • Using detector near
sensitivity power lines
• Using 2 detectors
in close
proximity
• Environmental
electromagnetic
interference
Low speaker • Discharged battery
volume • Wrong type of
battery
Display does not lock • Multiple targets
on to one Target-ID present
or detector emits • Highly mineralized
multiple tones soil
• Sensitivity set
too high
No power, no sounds • Dead battery
• Cable not
connected securely
Note: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Consult the dealer or an experienced radio/TV technician for help.
The manufacturer declares that the minimum ESD performance criteria is 1) the unit shall not
be permanently damaged and 2) operator intervention is allowed.
E
This product is RoHS compliant.
This product meets the requirements of Industry Canada: CAN ICES-3 B/NMB-3 B.
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SOLUTION
• Use detector
outdoors only
• Move away
from power lines
• Keep 2 detectors
at least 6 meters
(20') apart
• Reduce sensitivity
until erratic
signals cease
• Replace battery
• Use only 9Volt
alkaline battery
• Sweep searchcoil at
different angles
• Move to a
different location
• Reduce sensitivity
• Replace battery
• Check connections

TERMINOLOGY

The following terms are used throughout the manual and are standard
terminology among detectorists.
A relic is an object of interest by reason of its age or its association with
RELIC
the past. Many relics are made of iron, but can also be made of bronze
or precious metals.
Iron is a common, low-grade metal that is an undesirable target in certain
IRON
metal detecting applications. Examples of undesirable iron objects are
old cans, pipes, bolts and nails. Sometimes the desired target is made
of iron. Property markers, for instance, contain iron. Valuable relics can
also be composed of iron; cannon balls, old armaments and parts of old
structures and vehicles can also be composed of iron.
Metals which are made of, or contain iron.
FERROUS
Reference to a metal being "eliminated" means the detector will not emit
ELIMIN TION
a tone, nor display a Target-ID, when a metal object passes through the
searchcoil's detection field.
When the detector emits different tones for different types of metals, and
DISCRIMIN TION
when the detector "eliminates" certain metals, we refer to this as the
detector "discriminating" among different types of metals.
Discrimination is an important feature of professional metal detectors.
Discrimination allows the user to ignore trash and otherwise undesirable
objects.
Pinpointing is the process of finding the exact location of a buried object.
PINPOINTING
Long-buried metals can appear exactly like the surrounding soil and can
therefore be very hard to isolate from the soil.
Ground Cancelation is the ability of the detector to ignore, or "see
GROUND C NCEL TION
through," the earth's naturally occurring minerals, and only sound a tone
when a metal object is detected. This detector incorporates proprietary
circuitry to eliminate false signals from many mineralized soils.
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